Does anyone know how long it takes to get I-130 approved? I applied for my spouse in Nov 2001 and since he is on a multiple entry B1 B2 visa, can I get his status changed once his I-130 is approved. Any idea?

Does anyone know how long it takes to get I-130 approved? I applied for my spouse in Nov 2001 and since he is on a multiple entry B1 B2 visa, can I get his status changed once his I-130 is approved. Any idea?